@charset "utf-8";
@import url("reset.css");
*{
   margin: 0;
   padding: 0;
   list-style: none;
   font-family: "微软雅黑";
}
body,html{
    width: 100%;
    height: 100%;
    font-size: 62.5%;
}
header{
    width: 100%;
    height: 5rem;
    position: fixed;
    top: 0;
    img{
        width: 100%;
    }
    div{
        line-height: 3rem;
        text-align: center;
        border-bottom: 0.1rem solid black;
        display: flex;
                    justify-content: space-around;
    }
}
.kong{
                width: 20rem;
                height: 20rem;
                border-radius: 50%;
                font-size: 10rem;
                line-height: 20rem;
                text-align: center;
                margin:10rem auto;
                background: darkgrey;
            }